203012987 has 2 divisors, whose sum is σ = 203012988. Its totient is φ = 203012986.

The previous prime is 203012977. The next prime is 203012989. The reversal of 203012987 is 789210302.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-203012987 is a prime.

Together with 203012989, it forms a pair of twin primes.

It is a Chen prime.

203012987 is a modest number, since divided by 12987 gives 203 as remainder.

It is equal to p_11236469 and since 203012987 and 11236469 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (203012989) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101506493 + 101506494.

It is an arithmetic number, because the mean of its divisors is an integer number (101506494).

Almost surely, 2^203012987 is an apocalyptic number.

203012987 is a deficient number, since it is larger than the sum of its proper divisors (1).

203012987 is an equidigital number, since it uses as much as digits as its factorization.

203012987 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6048, while the sum is 32.

The square root of 203012987 is about 14248.2625958395. The cubic root of 203012987 is about 587.7255987073.

The spelling of 203012987 in words is "two hundred three million, twelve thousand, nine hundred eighty-seven".